i know carbon deposits are a thing.....

but has anyone seen how much of a thing they can end up being in a gti6 engine with an endoscope camera or engine dissasembly?

i keep seeing hydrogen decarbonization service posters in garages and tyre shops......

so i de mothballed and plugged in my hydrogen generator and went for a home brew approach.

HHO gas into the air intake till the engine and oil was warmed up, then the HHO gas plus 250ml of distilled water misted into the engine intake with the revs raised to about 2500 over 10ish minutes.

there was a puddle of black sooty water in the exhaust and on the floor below/behind my exhuast afterwards. engine feels a little smoother, less lumpy, quieter even. but thats alll butt dyno.

again, are carbon deposits a thing for the gti6 engine?

ive orderd a cheapy phone camera endoscope but its kinda redundant asto if my method does/did anything.

i also did similar to the above a week after with some inlet valve cleaner...spray through a running engine.

my only thoughts are/were for the valvle cleaner were faulty oil breather coats intake inside with oil,dust, grime n grot gets trapped in this oil....reducing intake diamaters.

thoughts? pics?

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i can't see how any of it would work, you're either risking hydrolocking the engine or just messing up the air /fuel mixture, I can't figure if it would make it lean or rich.

certainly not the best thing for the cylinder bores, you should see a block from an engine that's had a leaking headgasket ignored for a while, and then there's the lambda that typically gets toasted.

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Bring on the Trumpets.

i did the gaskets and cleaned it all in about 3 hours this afternoon.
the old gaskets were rather past their best.
went for a therma-tec thermally insulative gasket inlet manifold and throttle body set, 29.99 for them from the ebay. they seem good quality. little bit thicker than standard but went on ok with the oem bolts.

was rather oily inside the inlet manifold. port walls leading to the inlet valves were oily but the inlet valves and their surrounding area/walls were reasonably clean.

the port closest to the throttle body was the dirtiest. the further away the less oily.

it was rather interesting to see the oil patterns, where it was and wasnt deposited.
it looked like the intake runners were oilier on the sides of the tubes closest to the throttle body.
it was the same for the intake valves....the valve in each port closest to the throttle body was slightly oilier.

i guess this would suggest, greater airflow/cleaning effect against the far side (from throttle body) of each runner and intake port?.

either way, so far so good, might of even solved my weird cold start 2000rpm hesitation issue.

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the world is changed by people in sheds